Mobius + Ruppert Castor Brass Bullet Pencil Sharpener For an extra long tip Best for premium pencils with a smooth core lead The Castpr is machined from a solid block of brass and the design is reminiscent of M+R’s Grenade or Brass Bullet sharpener, but longer. The point the Castor produces is longer than a standard sharpener. It has a unique longer blade and is designed to make a long elegant pencil point. Sharpen slowly to get the best results.  Suited for pencils up to 6 mm in diameter (standard #2 style pencils.) Replaceable M+R quality blade (#0100-6010) is made of specially hardened steel. 1-1/8″ long (28 mm). Made in Germany.